Summary
SUMMARY
ABOUT THIS MANUAL ........................................................................................... 5
ABBREVIATIONS AND DEFINITIONS ................................................................................................... 5
NUMERICAL REPRESENTATION ........................................................................................................... 5
1 INTRODUCTION TO SERIAL COMMUNICATION ................................................. 6
1.1 THE MODBUS-RTU PROTOCOL .................................................................................................... 6
1.2 TRANSMISSION MODES ............................................................................................................... 6
1.3 RTU MODE MESSAGE STRUCTURE ................................................................................................ 6
1.3.1 Address.............................................................................................................................................. 7
1.3.2 Function Code ................................................................................................................................... 7
1.3.3 Data Field ......................................................................................................................................... 7
1.3.4 CRC ................................................................................................................................................... 7
2 ACCESSORY KIT .................................................................................................. 8
2.1 MODBUS-RTU INTERFACE ............................................................................................................ 8
2.1.1 Modbus-RTU Kit ................................................................................................................................ 8
2.1.3 Power Supply .................................................................................................................................... 9
2.2 CONNECTION WITH THE NETWORK ............................................................................................ 9
2.3 MODULE CONFIGURATION ......................................................................................................... 9
2.4 STATUS INDICATION .................................................................................................................... 9
3 RELAY PARAMETERIZATION ............................................................................. 10
P202 – OPERATION MODE ............................................................................................................... 10
P220 – LOCAL/REMOTE SELECTION ................................................................................................. 10
P232 – REMOTE COMMAND SELECTION .......................................................................................... 10
P233 – RETENTIVE OR IMPULSIVE CONTROL (FIELDBUS) ................................................................... 10
P277 – DIGITAL OUTPUT O1 FUNCTION .......................................................................................... 11
P278 – DIGITAL OUTPUT O2 FUNCTION .......................................................................................... 11
P279 – DIGITAL OUTPUT O3 FUNCTION .......................................................................................... 11
P280 – DIGITAL OUTPUT O4 FUNCTION .......................................................................................... 11
P281 – DIGITAL OUTPUT O5 FUNCTION .......................................................................................... 11
P282 – DIGITAL OUTPUT O6 FUNCTION .......................................................................................... 11
P283 – DIGITAL OUTPUT O7 FUNCTION .......................................................................................... 11
P284 – DIGITAL OUTPUT O8 FUNCTION .......................................................................................... 11
P310 – CONFIGURATION OF THE SERIAL INTERFACE BYTES ............................................................. 12
P313 – COMMUNICATION ERROR ACTION ...................................................................................... 12
P314 – SERIAL WATCHDOG .............................................................................................................. 13
P725 – COMMUNICATION MODULE ADDRESS ................................................................................ 13
P726 – DEVICENET/MODBUS BOARD BAUD RATE ............................................................................ 14
P770 – READING PROGRAMMABLE PARAMETER #1 .......................................................................... 14
P771 – READING PROGRAMMABLE PARAMETER #2 .......................................................................... 14
P772 – READING PROGRAMMABLE PARAMETER #3 .......................................................................... 14
P773 – READING PROGRAMMABLE PARAMETER #4 .......................................................................... 14
P774 – READING PROGRAMMABLE PARAMETER #5 .......................................................................... 14
P775 – READING PROGRAMMABLE PARAMETER #6 .......................................................................... 14
P780 – VALUE OF THE READING PROGRAMMABLE PARAMETER #1 .................................................. 14
P781 – VALUE OF THE READING PROGRAMMABLE PARAMETER #2 .................................................. 14
P782 – VALUE OF THE READING PROGRAMMABLE PARAMETER #3 .................................................. 14
P783 – VALUE OF THE READING PROGRAMMABLE PARAMETER #4 .................................................. 14
P784 – VALUE OF THE READING PROGRAMMABLE PARAMETER #5 .................................................. 14
P785 – VALUE OF THE READING PROGRAMMABLE PARAMETER #6 .................................................. 14
4 MODBUS-RTU COMMANDS USED AT THE SRW 01 .......................................... 15
4.1 01H COMMAND: READ COIL STATUS ........................................................................................ 15
4.2 02H COMMAND: READ INPUT STATUS ....................................................................................... 15
4.3 03H COMMAND: READ HOLDING REGISTER .............................................................................. 15